The Diagram Below Shows the Domestic Demand and Supply Curves

The diagram below shows the domestic demand and supply curves for denim jeans in Canada.The prevailing world price is P_W.Assume that all jeans are identical. FIGURE 33-2
-Refer to Figure 33-2.Suppose Canada has free trade in jeans and then imposes a tariff of $t per pair.The Canadian government's tariff revenues will be equal to

A) B + C.
B) E + F.
C) E + F + G + H.
D) F + G.
E) F + G + H.